1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H
3 #define _ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H
4 /*
5  * hash 4k can't share hugetlb and also doesn't support THP
6  */
7 #ifndef __ASSEMBLY__
8 #ifdef CONFIG_HUGETLB_PAGE
9 static inline int pmd_huge(pmd_t pmd)
10 {
11 	/*
12 	 * leaf pte for huge page
13 	 */
14 	if (radix_enabled())
15 		return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
16 	return 0;
17 }
18 
19 static inline int pud_huge(pud_t pud)
20 {
21 	/*
22 	 * leaf pte for huge page
23 	 */
24 	if (radix_enabled())
25 		return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
26 	return 0;
27 }
28 
29 static inline int pgd_huge(pgd_t pgd)
30 {
31 	/*
32 	 * leaf pte for huge page
33 	 */
34 	if (radix_enabled())
35 		return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE));
36 	return 0;
37 }
38 #define pgd_huge pgd_huge
39 /*
40  * With radix , we have hugepage ptes in the pud and pmd entries. We don't
41  * need to setup hugepage directory for them. Our pte and page directory format
42  * enable us to have this enabled.
43  */
44 static inline int hugepd_ok(hugepd_t hpd)
45 {
46 	if (radix_enabled())
47 		return 0;
48 	return hash__hugepd_ok(hpd);
49 }
50 #define is_hugepd(hpd)		(hugepd_ok(hpd))
51 
52 /*
53  * 16M and 16G huge page directory tables are allocated from slab cache
54  *
55  */
56 #define H_16M_CACHE_INDEX (PAGE_SHIFT + H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE - 24)
57 #define H_16G_CACHE_INDEX                                                      \
58 	(PAGE_SHIFT + H_PTE_INDEX_SIZE + H_PMD_INDEX_SIZE + H_PUD_INDEX_SIZE - 34)
59 
60 static inline int get_hugepd_cache_index(int index)
61 {
62 	switch (index) {
63 	case H_16M_CACHE_INDEX:
64 		return HTLB_16M_INDEX;
65 	case H_16G_CACHE_INDEX:
66 		return HTLB_16G_INDEX;
67 	default:
68 		BUG();
69 	}
70 	/* should not reach */
71 }
72 
73 #else /* !CONFIG_HUGETLB_PAGE */
74 static inline int pmd_huge(pmd_t pmd) { return 0; }
75 static inline int pud_huge(pud_t pud) { return 0; }
76 #endif /* CONFIG_HUGETLB_PAGE */
77 
78 #endif /* __ASSEMBLY__ */
79 
80 #endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_4K_H */
81